mason



(No Model.) 3 Sheets-Sheet 1.

M. MASON.

COFFEE PULPING MACHINE.

No. 550,834. Patented Dec. 3, 1895 WITNESSES: INVENTOIR:

By his Attorney 1a 5%. l

(No Model.) 3 Sheets-Sheet 2.

M.- MASON. COFFEE PULPING MACHINE.

No. 550,834. Patented Dec. 3, 1895.

WlTNESSES: 4 INVENTORS wd z Aflmflw. W i

ANDREW B GRAHAM, Pnorommwnsm NGTON. D c.

(No Model 3 Sheets-Sheet 3.

M. MASON.

COFFEE PULPING' MACHINE.

No. 550,834. Patented Dec. 3,1895.

rll WITNESSES I w M m By M A lomeys 4 /#J UNITED STATES PATENT OFFICE.

MARCUS MASON, OF NEYV YORK, N. Y.

COFFEE-PULPING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 550,834, dated December 3, 1895.

Application filed July 19, 1895. Serial No. 556,456. (NomodeL) To all whom it may concern.-

Be it known that I, MARCUS MASON, a citizen of 'the United States, residing in the city of New York, in the county and State of New York, have invented certain new and useful Improvements in Ooffee-Pulping Machines, of which the following is a specification.

The improvements in pulping machines forming the subject of this invention relate to a novel construction of the cylinder, the same consisting in providing the cylinder with abrading-pegs, the parts that project from the cylinder being enlarged or formed as heads, with their shoulders resting against the surface of the cylinder, thereby preventing the displacement of the pegs by the depression of them within the cylinder by reason of stones or other hard substances mixed with the cof-. fee-berries to be pulped, as would happen if said pegs were of uniform size throughout their length. These pegs have their heads preferably formed conoidal in shape, and to insure a perfect gripping and abrading ac tion on the coffee-berries the ends of the pegheads are scored or cut with star or cross shaped depressions; and the invention also contemplates the use of a punch or toolhaving correspondingly star or cross shaped out ting-edges adapted to be used to recut the abrading ends of the pegs when they become worn without removing the cylinder from the machine, the shoulders under the heads formmg a solid seat for such operation to be performed without disturbing or changing the positions of the pegs.

Another novel feature in this class of machine consists in utilizing the water-pipes which supply water for washing the pulp from the coffee-berries as they leave the machines as a means of support for the screen or sieve upon which the berries and pulp are washed and separated, said screen being supported by the pipe-frame by means of swinging rods.

These and other features of construction in coffee-pulping machines will be now fully described, referring to the drawings forming part of this specification, in which- Figure 1 is a side elevation of my improved coffee-pulper; Fig. 2, afront elevation. Fig. 3 is a vertical section of the same on the line 3 3 of Fig. 2. Fig. 4 is a section of part of the cylinder on an enlarged scale; Fig. 5, a

plan of the washing-pipes used as a support for the screen on a reduced scale. Fig. 6 is an elevation and plan of one of the abradingpins, and Fig. 7 is an elevation and end view of the punch or tool for cutting or forming the ends of the pins.

The active or main Working part of the machine is a plain hollow cylinder a, as shown at Fig. 3, having radial holes a a drilled or otherwise formed through its shell, as shown at Fig. 4.. The pegs which are seated in these holes are, as clearly shown at Figs. 4 and 6, composed of straight shanks Z) Z), made to fit tightly in the holes a a, and conoidal-shaped heads I) b, the shoulders of which rest on the surface of the cylinder a when the pegs are driven home therein. 111 the ends of the pegheads are formed cross-cuts or depressions, two being shown in the drawings, and to form these cuts I have devised a special simple tool which I will now describe. This tool consists of a piece of steel 0, having grooves formed in one end in such manner that their meeting edges constitute the cutting-edges c c, said cutting edges being inclined inwardly, as shown, so that a firm grip on the heads of pegs is had when the tool is being used to cut or reset the pegs.

The shaft a of the cylinder a is fitted to rotate in bearings in the side frames dand d, which are secured together by bolts and by the girder (1 These frames carry the lower half 6 of the case, the bottom of which is provided with an opening for the discharge of the water fed into the machine with the coffeeberries and for discharge of such of the pulp as passes by the breast of the machine. The upper half a of the case is hinged to the lower half 6 at 2 a space being left between the two halves of the case in front of the pulping-cylinder for the admission of the breastpiece,which will be hereinafter described. In the upper part of the top half 6 of the case is formed the hopper a, into which the coffee berries are fed and over the edge of which said coffee-berries are washed onto the front side of the cylinder by the water supplied to the hopper. When it is desired to reset or sharpen the abrading-pegs of the cylinder a, the upper half of the case is thrown back on the hinge e and the tool 0 applied to the pegs while the cylinder a is in its working position in the machine. The breast f is formed to fit into the opening between the parts e and e of the case. Its inner face is curved to correspond to curvature of the cylinder, and it has formed through it curved and inclined passages, the curved sides of the adjacent passages meeting at points, thereby allowing the coffee-berries to pass freely down said passages. These openings in the breast f are closed by the plates g g all but their lower ends, which are left free as openings g g for the discharge of the coffeeberries and pulp from the machine. The plates 9 g are hinged at their upper ends to the breast f at 9 and their lower ends are controlled, so as to be adjustable to andfrom the cylinder a,by the thumb-screws h h, which pass through the bar h, secured to the front of the breast f, and which are locked by the nuts 71. 71 when the plates 9 g are properly set.

The breast f is held in position by lugs on its ends seated in recesses formed in the frames d and d and is pressed toward the cylinder a by bolts 1' c', which pass through caps fitted over the recesses of the frames and the ends of which abut against the lugs of the breast. The bolts or screws 1; z" are for the purpose of setting or leveling the breast f. It will thus be seen that the space between the moving abrading teeth or pegs of the cylinder and the counter-walls of the breast may be varied, as desired, to cause the proper crushing and rubbing action on the coffeeberries to take place. Projecting upwardly from the frames (1 and d are the bracketarms 3' j, and these carry the rectangular system of water-pipes, the two front transverse branches 7c of which are provided with jets or spouts 70 k set to direct streams of water in a downward direction. The cook 70 regulates the flow of water in these pipes.

In front of and below the discharge-openings g g is arranged the screen I, set in a slightly angular position, and the case or receptacle Z is attached to the screen. to catch the coffee-beans which pass therethrough, said screen being of such a mesh as to admit of the passage of the beans, but to retain the pulp washed from the beans by the streams of Water from the jets k W, the pulp being discharged from the end of the screen. The lower central part of the case or receptacle Z has an opening Z for the discharge of the beans therefrom.

The screen Z is supported by four swinging bars 0% m and n n, pivoted at their lower ends to the sides of the screen Z, the upper ends of the bars m m being pivoted to the part c of the case, and the upper ends of the bars a n being pivoted to slotted arms 0 0, secured to outer transverse branch 7c of the rectangular system of water-pipes. The water-pipes are thus caused to perform a useful function besides supplying the washing-water and obviate the necessity of employing a'special support for the outer end of the screen. The object of the slotted arms 0 0 is to permit of the adjustment of the front supporting-pivots of the screen in different positions, thus allowing the inclination of the screen to be varied at pleasure.

The screen Z is oscillated to facilitate the separation of the coffee-beans from the pulp and the discharge of the pulp therefrom by means of the eccentrics p 19, carried by the shaft p,the eccentrics being connected by their connecting-rods q q to the sides of the screen and motion imparted to them from the shaft of the cylinder at through the me dium of the sprocket-wheels r 1- and chain r Power is applied to rotate the cylinder a through the medium of a belt acting on the pulley s, secured to the shaft of the cylinder.

I claim as my invention 1. A pulping cylinder for coffee pulping machines, consisting of a metal cylinder having holes formed radially therein, in combination with pegs having enlarged conoidal shaped heads, the shanks of the pegs being fitted in the holes and the shoulders of the heads resting against the surface of the cylinder, and the ends of the heads of the pegs having star or cross shaped abrading depressions.

2. In a coffee pulping machine, the combination of a pulping cylinder, a casing in which it is held, discharge openings in the casing, a sieve or screen in front of the discharge openings, a frame composed of pipes connected to a source of water supply and provided with jet nozzles arranged to direct water onto the screen, links or rods connecting the screen to the pipe frame, and means for rocking the screen.

3. In a coffee pulping machine, the combination of a pulping cylinder. a casin gin which it is held, discharge openings in the casing, a sieve or screen in front of the discharge openings, a frame composed of pipes connected to a source of water supply and provided with jet nozzles arranged to direct water onto the screen, adjustable links or rods connecting the outer end of the screen to the pipe frame, whereby the inclination of the screen may be varied, and means for rocking the screen.

4. In a coffee pulping machine, the combi nation of acylinder, abrading pegs having enlarged heads seated in holes therein, a case inclosing the cylinder and provided with hearings in which the shaft of the cylinder rotates, a breast piece attached to and forming part of the case, adjustably held in relation to the cylinder, and having inclined passage-ways formed therein, and coverings or hacks for said passage-ways adjustably connected to the breast piece.

In testimony whereof I have hereunto subscribed my name.

MAROUS MASON.

Witnesses:

G. B. ASENSIO, E. O. SoHERINKow. 

